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Fire safety of prestressed hollowcore floors

Shear capacity of hollowcore floors


Prestressed hollowcore units are now the most widely used type of precast flooring in Western Europe. This success is largely due to the highly efficient design and production methods, flexibility in use, surface finish and structural efficiency. However, some concern has been recently raised about the actual performance of hollowcore floors in fire, following some limited calamities in a few real fires. Also a few cases of premature shear failure in small scale standard fire tests were reported in the past. Henceforth, the question could be raised if this constitutes a real structural problem for this type of floor, or whether the reason lies in a lack of understanding of the behaviour of hollowcore slabs during heavy fire, resulting in poor design, also for small-scale laboratory test set-ups.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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